Lather, Rinse, and Repeat (LRR) is the name I give to high-intensity interval classes, specifically VO2 max intervals of 3 minutes or more. The VO2 max level of intensity is labeled as a “very hard” effort on the RPE scale, about an 8 on a 1–10 scale. Using power zones, VO2 max is Zone 5, 106% to 120% of FTP, functional threshold power...
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